<span>the answer is
C. The bar for very low concentration is twice the height of the bar for medium concentration.
proof
</span>
<span>
</span>
<span>Medium--------------------15
</span>Very Low-------------------30 = 2<span /> x 15 (<span>Medium)
</span>
Brenda is correct!
Hope this helps!:)
Im not sure I understand the question at hand..
Answer:
the 2nd one.
Explanation:
If it was half of b then it would be the 3rd.